This farce concerns the culprit in Lady Godard's murder. A certain detective makes it clear that Lady Godard was murdered by a member of her own family, despite their protests. Regrettably, the services of the detective's bodyguard are required. 
something much weaker, 
could be only one thing.
...شيء أضعف بكثير، فلا يمكن سوى أن يكون
dann kann es sich bei diesem Stoff
nur um eine einzige Sache handeln: …
cela ne laisse qu’une possibilité
sur la composition de ce pieu.
possiamo restringere il campo a una sola sostanza.
e que se desmancha fácil,
sobra apenas uma opção.
Думаю, становится очевидно,
из чего он был сделан.